Answer:
What can answer in any language? What can speak without a mouth? What can sing without an ear?
I am so simple that I can only point. Yet I guide men all over the world.
What goes through a door but never goes in. And never comes out?
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. The wind is my lover, one-Βlegged am I. Name me and see me at home in the sky.
I can run but not walk. Wherever I go, thought follows close behind.
When is it bad luck to see a black cat?